I'm a newbie fan. It's a given that I know very little about Arashi compared to others who have been loyal to them for years. I've watched several variety shows here and there to get to know more about them. So, here is what I found about each of them so far...
Matsumoto Jun
* Perfectionist.
* Hates to fail in anything. Hates to do embarrassing things. Hates myoga rice.
* Clean-freak. He uses drink coaster to keep his tables unmarked with stain!
* Not a morning person so he gets cranky in the morning. Probably due the reason that he sleeps really late at night.
* Likes checkered shirt especially the one in red. Likes to wear variety of hats and accessories compared to other members.
* Seems like a gourmet and he's so obsessed with sushi especially conger eel. Surprisingly he likes Samgyetang too.
* Quite observant because he usually notices if someone cuts their hair.
* He's a bit bow-legged and he admits that he does talk to himself at home.
Ohno Satoshi
* Always has blank poker face and it's hard to get him hype up over something. He didn't scream even once during the haunted house segments! That still amazed me though.
* He's not picky about food but he really loves bread and green curry.
* He's an artistic man. He can draw and sculpt figurine.
* He loves fishing and surprisingly he can hold his breath in water for quite a long time too.
Aiba Masaki
* He's a bit an airhead but he seems like someone who has pure-minded and honest quality about him. What you see is what you get kind of person.
* He's very friendly and out of Arashi members, he's the one who talks about his family the most. I mean, who doesn't know that his family runs a Chinese restaurant right?
* He's good with animals and good at running.
* Apart from Chinese food, I think he really likes chicken too.
Ninomiya Kazunari
* He's very well known for obsessing over games.
* He loves hamburger, curry and dandan noodle.
* He's very talkative and loud. Pretty sarcastic too at times.
* He's also very observant too from what I see. He seems to well-informed about other members because he knows what other members like and dislike for example.
* He hates sea but he loves things like underground and he's also a self-proclaimed the one who loves money the most between Arashi members.
* He loves wearing vest as his fashion item.
Sakurai Sho
* Very eloquent so he can give witty and funny remarks in most situations.
* He really loves clam and shellfish but he really hates coriander.
* Has no athletic ability but pretty good at study.
* He's also afraid of height.
* He's very good at doing something within time limit. Also a planner even when he's on vacation.
* His favourite place is perhaps Yokohama? because he always talk about going there.
~ I guess, this list will get longer as I get to know more about them in the future. Consider this as my personal reference about Arashi members.